JEE Main · 2022 · 27 Jul 2022 · Shift 2 · Hydrocarbons

Major product 'B' of the following reaction sequence is:

(A)(see structure)
(B)(see structure)
✓ Correct
(C)(see structure)
(D)(see structure)

Answer: (B)

Solution

The reaction sequence involves treatment with HI followed by KOH. In the first step, HI attacks the epoxide, opening it with iodide attacking the less substituted carbon (SN2 mechanism). The resulting iodo-alcohol then undergoes elimination with KOH to form the product. The major product B is the compound shown in option (B), which contains both Br and I substituents on the carbon chain with the correct regiochemistry.

JEE Main · 2022 · 27 Jul 2022 · Shift 2 · Single correct option

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